IGAAP cooperates with the following organizations and individuals:

• IFEX
  
  The Interdisciplinary Research Center for Extraterrestrial Studies at the Julius Maximilian University of Würzburg is dedicated to developing and promoting interdisciplinary aspects of the extraterrestrial studies by means of basic research, development and participation in scientific-technical application projects, as well as in terms of the creation of appropriate training programs. In addition, IFEX focuses on extraterrestrial research projects in the context of science and technology and their innovative application on Earth and in space. The work area includes research on Unidentified Aerial Phenomena (UAP).

• SOBEPS
  
  The Société Belge d'Etude des Phénomènes Spatiaux (since 2007 called COBEPS - Comité Belge d'Etude des Phénomènes Spatiaux) became known through the comprehensive investigation of the Belgian UFO Wave which occurred between 1989 and 1991. Today the main objective of COBEPS is to analyze current sightings from Belgium and to continue the research on the Belgian UFO Wave - especially on the sightings on the evening of November 29, 1989.

• Project 1947
  
  Project 1947 is a world-wide effort to document the origins of the modern UFO phenomenon. Research for the project has yielded many early-era UFO reports via the Freedom of Information Act (FOIA), newspaper articles and contemporary accounts. Project 1947 was initiated by renowned US-American UFO researcher Jan L. Aldrich. In 1996, with the assistance of America On Line and fellow researchers, he created Project 1947 as a private E-mail computer network to share and to encourage serious UFO research worldwide.

• Robert Hastings
  
  For more than 40 years, noted American researcher Robert Hastings has sought out former and retired US Air Force personnel regarding their direct or indirect involvement in nuclear weapons-related UFO incidents. These individuals - ranging from retired colonels to former airmen - report extraordinary encounters over nuclear facilities in the US and elsewhere. To date, Hastings has interviewed more than 150 military veterans who were involved in various UFO-related incidents at US missile sites, weapons storage facilities, and nuclear bomb test ranges. Robert Hastings’ book, UFOs and Nukes: Extraordinary Encounters at Nuclear Weapons Sites, has been revised and updated in 2017 and is considered one of the most important publications in the UFO field.